public class Printer implements IUSB,IPoer {
    @Override
    public void start() {
        System.out.println("打印复印文件资料");
    }

    @Override
    public void install() {
        System.out.println("安装打印机驱动程序");
    }

    @Override
    public void work() {
        System.out.println("打印机打印资料");
    }
}
